I saw the aftermath of a collision on an Autobahn. It shut it down. We walked about 200 yards to see what the hold up was, as it had just occurred. Saw a bunch of people in a farmers field about 300 feet off the autobahn. Turned out the impact was so great the engine was ripped from the vehicle and sitting way out in the field still smoking. I never did forget that.
My time over there only saw one fatal accident. The Polizei had large curtains erected around the crash to keep people from rubbernecking.
One thing that surprises me is that fatal accidents are really not as common over there as they are here. Even with virtually no speed limits their fatality rates are much lower than here.